Chapter 3 Review

Are the following ratios equal?

 $\frac{14}{21}$  and  $6:9$  

• Equal, because when you cross multiply the answers are the same

• NOT equal, because when you cross multiply the answers are different

Tags

CCSS.6.RP.A.3A

A giraffe that is 10 feet tall casts a shadow that is 15 feet. At the same time, a lemur casts a shadow that is 1.5 feet. How tall is the lemur?

• 1 ft

• 2.25 ft

Tags

CCSS.HSG.SRT.B.4

Mary ran 5 miles in 24 minutes. At the same rate, how far would Mary run in 6 minutes?

• 28.8 miles

• 1.25 miles

Tags

CCSS.6.RP.A.3B

 $\Delta ABC\ \sim\Delta XYZ$ 

What is the perimeter of XYZ?

• 11.25

• 17

• 24.5

• 45

A ratio of boys to girls in a PE class is 6:5.

If there are 42 boys in class, how many girls are there?

• 35 girls

• 50 girls

• 42 girls

• 31 girls

The ratio of boys to girls in a PE class is 6:5. If there are 42 boys in class, what is the total number of students in PE?

• 77 students

• 35 students

• 50 students

• 81 students

Mrs. Jones is painting a room in her house. She paints 20.5 square feet in 1/8 of an hour. At this rate, how many square feet does she paint each hour?

• 164 feet

• 2.5 feet

• 160 feet

• 25 feet

Tags

CCSS.7.RP.A.1

Ms. Wilson takes 1/5 of an hour to run 1/3 of a mile around her neighborhood. What is Ms. Wilson's unit rate, in miles per hour?

• 1 2/3 miles per hour

• 2 miles per hour

• 1 1/3 miles per hour

• 1/15 miles per hour

Tags

CCSS.7.RP.A.1

Mrs. Popovich is designing a new patio to be built on the back of her house. The scale drawing she created has the room 4 inches by 8.5 inches. The scale she used is 1 inch = 3 feet. What is the actual size of her room?

• 12 feet by 25.5 feet

• 4 feet by 8.5 feet

• 1.3 feet by 2.8 feet

• 12 feet by 24 feet

Tags

CCSS.7.G.A.1